The case for VM based Cloudlets in Mobile Computing -Mahadev Satyanarayanan†, Paramvir Bahl‡, Ramon Caceres•, Nigel Davies◦ †Carnegie Mellon University,‡Microsoft Research,•AT&T Research, ◦Lancaster University Presented by: Anjali Sridhar

Current Limitations of Mobile Devices Processor Speed Memory Size Battery Life Intrinsic to Mobility! Applications that augment human cognition require LARGE processing power and energy!

Motivation Compute intensive applications based on image processing, speech recognition, natural language processing, augmented reality etc that augment cognitive ability of users needs to be handled by a system capable of providing low latency results to the user

Example Scenario Cognitive assistance for an Alzheimer’s patient - lightweight wearable computer with a head-up display in the form of an eyeglass Eyeglass has a camera for scene capture and ear phones for audio feedback Augmented reality system to aid cognition

Proposed Solution Leverage the cloudlet-based resource-rich mobile computing resource Reduced one hop latency and peak bandwidth demand of multiple users

Cloud Vs Cloudlet Why is the Cloud not sufficient?

Cloudlet Cloud on Internet Mobile Device Distant Cloud on Internet Low Latency High Bandwidth Wireless network Coffee Shop Cloudlet

Solution Transient Cloudlet Customization Use of VM technology: VM Migration – Suspend VM, migrate the entire VM Dynamic VM Synthesis - Apply an overlay VM and resume execution

Cloudlet Customization – Dynamic VM Synthesis Approach

Implementation - Kimberley Mobile Device : Nokia N810 Internet Tablet Mobile OS: Maemo 4.0 linux Cloudlet Infrastructure: Desktop Computer Cloudlet OS: Ubuntu Linux

Kimberley Steps: 1)Prepare the overlay VM kimberlize <baseVM> <install-script> <resume-script> 2) Connect to the Cloudlet 3) Receive VM residue, Cleanup

Kimberley Creation Time for VM Overlays

Speed of VM Synthesis

Challenges Business Model – Top Down or Bottom Up? Base VM compatibility – How many Base VM’s do we need to have present at the cloudlet? Trust and Security – Is the cloudlet secure?

Thank You!